Box jigs and improved methods of forming the same



Aug. 9, 1960 A.H.STANTON,JRETAL BOX JIGS`AND IMPROVED MEHODS OF FORMING THE SAME Filed Nov. 4, 1957 2 Sheets-Sheet 1 '4 +P l INVENToRs 4 L zo ARTHUR H.

sTANToN,JR a LE ISLE o. NOBLE AT ORNEY Aug. 9, 1960 A. H. STANTON, JR., ET AL BOX JIGS AND IMPROVED METHODS OF FORMING THE SAME Filed Nov. 4, 1957 2 Sheets-Sheet 2 FIG. 3

FIG. 9

INVENTORS ARTHUR H. STANTON Q ISLE D. NOBLE ATTQRNEY I lo "ii //l FIG. 6

FIG. 8

Arthur H. Stanton, Jr., Novelty, ond Lo rslo D. Noble,

Hudson, Ohio, assignors to The Standard Parts Company, Bedford, Ohio, a corporation of Ohio Filed Nov. 4, 1957, ser. No. 694,420

z claims. (cl. 'l1-62) The invention relates to jigs and particularly to a new and improved box jig.

The invention also 4relates to improved methods of forming box jigs.

Jigs are one of variousV mechanical contrivances used in manufacturing. They are work-holding devices. Box jigs are one type of jigs.

The purposes of the invention are:

To provide an eicient and rugged box jig characterized by its light weight;

To provide a irm and dependable integration between aluminum walls and cast-iron corner posts of which the jig is comprised;

To eifect the aforesaid integration by a simple and inexpensive procedure; and

-To provide jig posts which are interchangeable.

The annexed drawings and the following descriptionv set forth in detail certain means embodying our improvements in box jigs, and certain steps exemplifying the improved method by which said box jigs are made, such means and steps setting forth, respectively, however, only one of the various forms in which the principle of the improved jig lmay be embodied, and only one of the various series of steps by which the improved method may be carried out.

In said annexed drawings:

Figure l is a perspective View of the improved box jig, a part of the jig lid being'broken away;

Figure 2 is a plan view with parts broken away and an upper part of one corner of the jig in section;

Figure 3 is a vertical section, taken in the plane indicated by the line 3-3, Figure 2.;

Figure 4 is a fragmentary side elevation, taken from the plane indicated by the line 1 -4, Figure 2;

Figure 5 is a fragmentary plan section, taken from the plane indicated by the line 5-5, Figures 3 and 4;

Figure 6 is a fragmentary rear elevation, taken from the plane indicated by the -line 6 6, Figure 2;

Figure 7 is a detail plan view of a corner post of the improved box jig indicating holes through the corner post for forming a continuous and endless cast aluminum body of the aluminum material in said holes, the walls between adjacent corner posts, and the jig oor.

Figure 8 is a detailed elevation of part of the elements shown in Figure 4; and

Figure 9 is a detailed elevation of certain of the elements shown in Figure 6.

Referring to the annexed drawings in which the several elements are indicated by the same respective numbers in the different views, the improved box jig is an integrated structure formed in a sand mold and comprised of four finished and identical interchangeable cast-iron corner posts land a cubical body 2 of toughened aluminum, the latter being a hollow casting having a front wall 3, a rear wall 4, sidewalls 5, and a peripherally-beveled bottom iloor 6. There is also a cast-iron jig lid 7 secured at the rear end of the jig by hinges 8 to a pin 13 pivotally 2 mounted in the Arear corner posts 1. The front part of the lid 7 is longitudinally slotted forthe accommodation of. a retaining quarter-turn screw Z1' engaged in the top ofthe front bodywll 3.' I The posts [which are cst'rst asY separate units and i their positioned -ir'-thcinold in spaced relation to define an interior chamber are formed with a plurality of trans verse spaced holes 10, each hole 10 being formed of communicating hole sections 9 formed in each of the inner faces 11 of the posts 1, Figures 5, 6, 7, 8, and 9'. VThese hole sections 9 communicate one with the other at their inner adjacent ends so Vthat there are continuous holes =10 through the posts 1 leading from both ends of the front and rear jig walls 3 and 4 to the respective side walls 5. There are a multiple of these holes 10 in each post 1 and they are vertically spaced one from the other by post gussets 12. These cast-iron gussets 12 provide additional strength for the integrated cast-iron and aluminum jig. Although the interior angle between the communicating ends of the post hole sections 9 may be any one suitable for forming in the holes 10 continuous cast aluminum integrated with the adjacent front and rear walls 3 and 4, andthe side walls 5, preferably this angle is an acute one, as indicated by 15, Figure 7, whereby the strength of the jig is increased. j

The corner posts lare formed to provide shoulders 16 upon their faces confronting the lid 7, which shoulders 16, upon the two rear posts 1, form rests for the lid 7. These posts 1 are further formed to provide shoulders Z0 on both of their inside faces, and yare dish-shaped in the central portions of their outside faces as indicated by the numerals V19.

The bottom floor 6.0i the aluminum body is provided with an integral upper pad portion 17 covering the greater part of the top surface of the floor 6, the marginal portion of this pad 17 being grooved downwardly, as indicated by 18, and thence forming anintegral cast structure with the upright aluminum body walls 3, 4, and 5.

Prefenably, the cast-iron posts 1 are preheated preliminarily to the casting of the aluminum walls 3, 4, and 5, the aluminum material in the holes 10, and the floor 6, such preheating not exceeding a maximum of about 700 F. Then the aluminum structure is cast, the aluminum owing into and through the holes 10 to form a solid continuous and endless aluminum casting. Since aluminum has a higher shrinkage coecient than cast-iron, casting of the aluminum structure draws the corner posts 1 together and results in a sure =grip and tight joints between the iron corner posts and the aluminum body structure.

What we claim is:

`1. A box jig comprised of spaced cast-iron posts each having a plurality of holes therethrough spaced one from the other by post gussets, and a cast aluminum structure having walls between adjacent posts, said structure extending through and completely lilling the holes in the respective posts to form a continuous and endless aluminum body, said aluminum body having a cast jig floor, the aluminum material in the post holes intersecting two relatively angular wall faces of the respective posts, and the interior angles `formed by adjacent parts of said aluminum material in the post holes being acute ones'.

2. A rugged and light weight composite jig of cast iron and cast aluminum comprising a box-like structure having a plurality of spaced cast-iron posts dening a chamber, said posts each having a plurality of holes therethrough spaced apart by post gussets, said structure also having an endless and continuous cast aluminum body providing sides for 4the chamber between respectively adjacent posts and extending through and completely lling the holes of the posts, said aluminum body being irmly Patented Aug. V9, 196,0

References Cited in the le of this patent UNITED STATES PATENTS 5 Fitzpatrick NOV. 9, Coble lIan.`3, 1928 Mead Apr.' 15, 1930 Hines Feb. 3, 1931 10 Nelson Ian.v 7, 1936 Sinclair July 12, 1938 Hines Dec. 24, 1940 Hentschel July 20, 1943 Scharfe Nov. 13, 1951 Rust Nov. 5, 1957 Gracon Nov. 19, 1957 FOREIGN PATENTS Great Britain' 11896 

